6 1 10 Adlin U. Lubis Additional Author Iman Yani Harahap Additional Author TEGUH WAHYONO Additional Author Endang Syamsuddin Additional Author M. Lukman Fadli Additional Author A. Sipayung Additional Author P. Purba Additional Author T.L. Tobing Additional Author R.A. Lubis Additional Author R. Desmier de Chanon Additional Author Soedharto Ps Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1992 COVER_VOL.12_NO.2_JUNI_1992.jpg Adlin U. Lubis Additional Author Iman Yani Harahap Additional Author TEGUH WAHYONO Additional Author M. Lukman Fadli Additional Author A. Sipayung Additional Author P. Purba Additional Author Rolettha Y. Purba Additional Author R. A. Lubis Additional Author Fidber Chan Additional Author Sudharto Ps Additional Author D. Ansyari Additional Author Okky S. Dharmaputra Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1993 COVER_VO._13_NO.1_FEBRUARI_1993.jpg TEGUH WAHYONO Additional Author M. Lukman Fadli Additional Author A. Sipayung Additional Author R.A. Lubis Additional Author Rolettha Y. Purba Additional Author Sudharto Ps Additional Author Suwandi Additional Author R. Desmier De Chenon Additional Author P. Simatupang Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1992 COVER_VOL.12_NO.3_OKTOBER_1992.jpg Daswir Additional Author LALANG BUANA Additional Author Dwi Asmono Additional Author DARNOKO Additional Author A. Razak Purba Additional Author Fatmawati Additional Author A.Sipayung Additional Author SOEMARTONO Additional Author Nasrullah Additional Author Tri Hutomo Additional Author Rachmat Adiwiganda Additional Author Zulkarnain Poeloengan Additional Author Akiyat Additional Author A.D. Koedadiri Additional Author A.U. Lubis Additional Author P.Purba Additional Author R.A.Lubis Additional Author Alex Hartana Additional Author Edi Guhardja Additional Author Sudirman Yahya Additional Author L.A. Napitupulu Additional Author G.Ginting Additional Author J.Brahmana Additional Author Iswandi Anas Additional Author mixed material Medan Pusat Penelitian Kelapa Sawit 1993 IMG_20190201_0001.jpg Kabul Pamin Additional Author LALANG BUANA Additional Author Purboyo Guritno Additional Author DARNOKO Additional Author Condro Utomo Additional Author A.Sipayung Additional Author Akiyat Additional Author R.A.Lubis Additional Author A.R. Purba Additional Author Adlin U.Lubis Additional Author E.Syamsuddin Additional Author R.Y. Purba Additional Author Adelina Manurung Additional Author E.Manalu Additional Author P.M. Naibaho Additional Author E. Gumbira-Sa\'id Additional Author mixed material Medan Pusat Penelitian Kelapa Sawit 1994 IMG_20190131_0001.jpg Endang Syamsuddin Additional Author R.A. Lubis Additional Author Fidber Chan Additional Author Sudharto Ps Additional Author Suwandi Additional Author A.U. Lubis Additional Author Ch. Hutauruk Additional Author R. Sukarji Additional Author Herman Halim Additional Author Kusnu M Additional Author Y.R. Lubis Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1984 COVER_VOL.4_NO.1_APRIL_1984.jpg